Johnson Controls York ZN Series User manual

R-410A
ZN SERIES W/SMART EQUIPMENT™
6.5 - 12.5 Ton
60 Hertz
5808012-TIM-A-0320
Table of contents
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Preceding installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Limitations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Rigging and handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Ductwork . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Side panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Condensate drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Compressors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Power and control wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Optional electric heat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Optional gas heat. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Options and accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Economizer sequences . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Power exhaust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Smart Equipment™ economizer board . . . . . . . . . . . . . . . . . . 43
Airflow performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Air balance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Checking air quantity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Cooling operation 2 fan cooling operation . . . . . . . . . . . . . . . . . . 60
Cooling operation 4 fan cooling operation . . . . . . . . . . . . . . . . . . 60
Cooling Operation Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Electric heating sequence of operations . . . . . . . . . . . . . . . . . 62
Electric heat operation errors . . . . . . . . . . . . . . . . . . . . . . . . 62
Gas heating sequence of operations. . . . . . . . . . . . . . . . . . . . 63
Ignition control board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Gas heating operation errors . . . . . . . . . . . . . . . . . . . . . . . . 63
Cooling start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Gas heat start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Checking gas heat input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Navigation components for the Smart Equipment™ control board . . 67
Smart Equipment™ unit control board . . . . . . . . . . . . . . . . . . . . . 68
Charging the unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Start-up sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
List of tables
1 Component location table . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2 ZNT06 - T12 unit limitations . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3 ZNT06 - T12 standard unit weights . . . . . . . . . . . . . . . . . . . . 11
4 ZNT06 - T12 unit accessory weights . . . . . . . . . . . . . . . . . . . 11
5 ZNT06 - T12 unit physical dimensions . . . . . . . . . . . . . . . . . 13
6 ZNT06 - T12 unit clearances . . . . . . . . . . . . . . . . . . . . . . . . . 14
7 ZNT06 -T10 side duct dimensions. . . . . . . . . . . . . . . . . . . . . 16
8 ZNT12 side duct dimensions . . . . . . . . . . . . . . . . . . . . . . . . . 17
9 Left/end duct dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
10 Control wire sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
11 Electrical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
12 Physical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
13 Electric heat minimum supply air . . . . . . . . . . . . . . . . . . . . . . 35
14 Gas pipe sizing - capacity of pipe . . . . . . . . . . . . . . . . . . . . . 36
15 Gas heat minimum supply air . . . . . . . . . . . . . . . . . . . . . . . . 36
16 Supply air limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
17 Altitude/temperature correction factors . . . . . . . . . . . . . . . . . 49
18 Airflow performance - side duct application . . . . . . . . . . . . . . 51
19 Airflow performance - bottom duct application . . . . . . . . . . . 54
20 RPM selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
21 Indoor blower specifications . . . . . . . . . . . . . . . . . . . . . . . . . 56
22 Power exhaust specifications . . . . . . . . . . . . . . . . . . . . . . . . 56
23 Motor sheave datum diameters . . . . . . . . . . . . . . . . . . . . . . 58
24 Electric Heat Limit Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
25 Electric heat anticipator setpoints . . . . . . . . . . . . . . . . . . . . . 63
26 Gas heat anticipator setpoints . . . . . . . . . . . . . . . . . . . . . . . 64
27 Gas rate cubic feet per hour . . . . . . . . . . . . . . . . . . . . . . . . . 66
28 Gas heat stages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
29 Gas heat limit control settings . . . . . . . . . . . . . . . . . . . . . . . . 67
30 Cable for FC buses and SA buses in order of preference . . 74
31 Ignition control flash codes . . . . . . . . . . . . . . . . . . . . . . . . . . 74
32 ZNT06 charging table - system 1 . . . . . . . . . . . . . . . . . . . . . 75
33 ZNT06 charging table - system 2 . . . . . . . . . . . . . . . . . . . . . 75
34 ZNT07 charging table - system 2 . . . . . . . . . . . . . . . . . . . . . 76
35 ZNT07 charging table - system 1 . . . . . . . . . . . . . . . . . . . . . 76
36 ZNT08 charging table - system 1 . . . . . . . . . . . . . . . . . . . . . 77
37 ZNT08 charging table - system 2 . . . . . . . . . . . . . . . . . . . . . 77
38 ZNT10 charging table - system 1 . . . . . . . . . . . . . . . . . . . . . 78
39 ZNT10 charging table - system 2 . . . . . . . . . . . . . . . . . . . . . 78
40 ZNT12 charging table - system 1 . . . . . . . . . . . . . . . . . . . . . 79
41 ZNT12 charging table - system 2 . . . . . . . . . . . . . . . . . . . . . 79
List of figures
1 Unit shipping bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2 Barometric relief hood - shipping location . . . . . . . . . . . . . . . 5
3 Compressor section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4 Component location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
5 4 point and 6 point load weight for ZNT12 units . . . . . . . . . . 10
6 4 point and 6 point load weight for ZNT06 -T10 units. . . . . .10
7 Center of gravity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
8 ZNT06 -T10 physical dimensions . . . . . . . . . . . . . . . . . . . . . 12
9 ZNT12 physical dimensions . . . . . . . . . . . . . . . . . . . . . . . . . 13
10 ZNT06 - T12 unit bottom duct openings . . . . . . . . . . . . . . . . 15
11 ZNT06 - T12 unit electrical entry . . . . . . . . . . . . . . . . . . . . . 16
12 ZNT06 - T12 unit left/end duct opening . . . . . . . . . . . . . . . . 17
13 ZNT06 - T12 roof curb . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
14 ZNT06 - T12 transition roof curb . . . . . . . . . . . . . . . . . . . . . 18
15 Side panels with hole plugs . . . . . . . . . . . . . . . . . . . . . . . . . 19
16 Return down flow plenum with panel . . . . . . . . . . . . . . . . . . 19
17 Discharge panel in place . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
18 Side panels for economizer hood tops . . . . . . . . . . . . . . . . . 20
19 Condensate drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
20 Field wiring disconnect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
21 Typical control wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
22 Side entry gas piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
23 Bottom entry gas piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
24 Simplified VFD wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
25 SE-ECO1001-0 economizer controller . . . . . . . . . . . . . . . . . 43
26 Belt adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
27 Altitude/temperature correction factors . . . . . . . . . . . . . . . . 49
28 Dry coil delta P . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
29 Typical flame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
30 Typical two stage gas valve . . . . . . . . . . . . . . . . . . . . . . . . . 67
31 Unit control board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

5808012-TIM-A-0320
2Johnson Controls Ducted Systems
General
TempMaster ZNT06 - T12 units are single package air
conditioners with optional gas heating designed for outdoor
installation on a rooftop or slab and for non-residential use. The
units can be equipped with factory or field-installed electric
heaters for heating applications.
The units are completely assembled on rigid, permanently
attached base rails. All piping, refrigerant charge, and electrical
wiring is factory installed and tested. The units require electric
power, gas supply (where applicable), and duct connections.
The electric heaters have nickel-chrome elements and use
single-point power connection.
Safety considerations
This is a safety alert symbol. When you see this symbol
on labels or in manuals, be alert to the potential for
personal injury.
Understand and pay particular attention the signal words
DANGER, WARNING or CAUTION.
DANGER indicates an imminently hazardous situation, which,
if not avoided, will result in death or serious injury.
WARNING indicates a potentially hazardous situation, which,
if not avoided, could result in death or serious injury.
CAUTION indicates a potentially hazardous situation, which, if
not avoided may result in minor or moderate injury. It is also
used to alert against unsafe practices and hazards involving
only property damage.
Due to system pressure, moving parts, and electrical
components, the installation and servicing of air conditioning
equipment can be hazardous. Only qualified, trained service
personnel must install, repair, or service this equipment.
Untrained personnel can perform basic maintenance functions
of cleaning coils and filters, and replacing filters.
Observe all the precautions in the literature, labels, and tags
that accompany the equipment whenever you work on air
conditioning equipment. Be sure to follow all other applicable
safety precautions and codes including ANSI Z223.1 or CSA-
B149.1- latest edition.
Wear safety glasses and work gloves. Use quenching cloth and
have a fire extinguisher available during brazing operations.
Improper installation may create a condition where the
operation of the product could cause personal injury or
property damage. Improper installation, adjustment,
alteration, service or maintenance can cause injury or
property damage. Refer to this manual for assistance or
for additional information, consult a qualified contractor,
installer or service agency.
This product must be installed in strict compliance with
the installation instructions and any applicable local,
state and national codes including, but not limited to
building, electrical, and mechanical codes.
Before you perform service or maintenance operations
on the unit, turn off the main power switch to unit.
Electrical shock could cause personal injury. Improper
installation, adjustment, alteration, service or
maintenance can cause injury or property damage.
Refer to this manual. For assistance or additional
information consult a qualified installer, service agency,
or the gas supplier.
This system uses R-410A refrigerant which operates at
higher pressures than R-22. No other refrigerant may be
used in this system. Gage sets, hoses, refrigerant
containers and recovery systems must be designed to
handle R-410A. If you are unsure, consult the equipment
manufacturer. Failure to use R-410A compatible servicing
equipment may result in property damage or injury.
If the information in this manual is not followed exactly, a
fire or explosion may result causing property damage,
personal injury or loss of life.
Do not store or use gasoline or other flammable vapors
and liquids in the vicinity of this or any other appliance.
What to do if you smell gas
• Do not try to light any appliance.
• Do not touch any electrical switch.
• Do not use any phone in your building.
• Immediately call your gas supplier from a neighbor’s
phone. Follow the gas supplier’s instructions.
• If you cannot reach your gas supplier, call the fire
department.
Installation and service must be performed by a qualified
installer, service agency, or the gas supplier.

5808012-TIM-A-0320
Johnson Controls Ducted Systems 3
Inspection
As soon as you receive a unit, you must inspect it for possible
damage during transit. If damage is evident, note the extent of
the damage on the carrier’s freight bill. You must make a
separate request for inspection by the carrier’s agent in writing.
Reference
Additional information is available in the following reference
forms:
• Technical Guide - ZV/ZNTA3 - T12, 5123249
• General Installation - ZNT06 - T12, 5808012
• Smart Equipment™ Control Quick Start Guide - 1136326
• Economizer Accessory -
Downflow Factory Installed
Downflow Field Installed
Horizontal Field Installed
• Motorized Outdoor Air Damper
• Manual Outdoor Air Damper (0-100%)
• Manual Outdoor Air Damper (0-35%)
• Gas Heat Propane Conversion Kit
• Gas Heat High Altitude Kit (Natural Gas)
• Gas Heat High Altitude Kit (Propane)
•–60F Gas Heat Kit
• Electric Heater Accessory
Renewal parts
Contact your local TempMaster parts distribution center for
authorized replacement parts.
Approvals
The design is certified by CSA as follows:
• For use as a cooling only unit, cooling unit with
supplemental electric heat or a forced air furnace.
• For outdoor installation only.
• For installation on combustible material and may be installed
directly on combustible flooring or, in the U.S., on wood
flooring or Class A, Class B or Class C roof covering
materials.
• For use with natural gas. The unit can be converted to LP
with a kit.
This product must be installed in strict compliance with
the enclosed installation instructions and any applicable
local, state and national codes including, but not limited
to, building, electrical, and mechanical codes.
The furnace and its individual shut-off valve must be
disconnected from the gas supply piping system during
any pressure testing at pressures in excess of 1/2 PSIG.
Pressures greater than 1/2 PSIG will cause gas valve
damage resulting in a hazardous condition. If it is
subjected to a pressure greater than 1/2 PSIG, the gas
valve must be replaced.
The furnace must be isolated from the gas supply piping
system by closing its individual manual shut-off valve
during any pressure testing of the gas supply piping
system at test pressures equal to or less than 1/2 PSIG.
This product must be installed in strict compliance with
the enclosed installation instructions and any applicable
local, state, and national codes including, but not limited
to, building, electrical, and mechanical codes.
Improper installation may create a condition where the
operation of the product could cause personal injury or
property damage.
This system uses R-410A Refrigerant which operates at
higher pressures than R-22. No other refrigerant may be
used in this system.

5808012-TIM-A-0320
4Johnson Controls Ducted Systems
Nomenclature
ZNT06N 08 A 2 A A C 2 1 B A 7
Product Category
Z = A/C, Single Pkg., R-410A
Product Generation
7 = Seventh Generation
8 = Eighth Generation
Natural Gas Heat Options
Electric Heat Options
Nominal Cooling Capacity
Product Identifier
N = Pkg AC High Eff 3-Stage
2
4
5
Voltage
= 208/230-3-60
= 460-3-60
= 575-3-60
VFD Options
A = None
B = VFD,VAV
C = VFD, w/Bypass, VAV
D = Cust Sup VFD,VAV
E = VFD, IntelliSpeed
F = VFD ,w/Bypass, Intellispeed
G = Cust Sup VFD, Intellispeed
A = No Options Installed
Installation Options
B = Option 1
C = Option 2
D = Options 1 & 2
E = Option 3
F = Option 4
G = Options 1 & 3
H = Options 1 & 4
J = Options 1, 2 & 3
K = Options 1, 2, & 4
L = Options 1,3 & 4
M = Options 1, 2, 3, & 4
N = Options 2 & 3
P = Options 2 & 4
Q = Options 2, 3, & 4
R = Options 3 & 4
S = Option 5
T = Options 1 & 5
U = Options 1, 3, & 5
V = Options 1, 4, & 5
W = Options 1, 3, 4, & 5
X = Options 3 & 5
Y = Options 4 & 5
Z = Options 3, 4 & 5
1 = Disconnect
2 = Non-Pwr'd Conv. Outlet
3 = Smoke Detector S.A.
4 = Smoke Detector R.A.
5 = Pwr'd Conv. Outlet
Options
Filter Options
1 = 2" Throwaway Filters
2 = 2" Pleated Filters (Merv 8)
3 = 2" Cleanable Filters
4 = 4" Pleated Filters (Merv 13)
A = None
C = BACnet MSTP,Modbus,N2 COM Card
E = Verasys Single Zone
G = Verasys Change Over Bypass
H = Hnywll Excel 10 Ctrl, DFS, APS
J = Verasys VAV
N = Novar UCM Ctrl, DFS, APS
P = CPC Control, DFS, APS
Control Options
3-12.5 Ton Model Number Nomenclature
Heat Type
C = Cooling Only. No heat installed
N = Alum Steel, Two Stage
S = Stainless Steel Two Stage
Nominal Heat Capacity (Unit Size Allowed)
Cooling
00 = Cooling Only
Configuration Options
1 = Bottom Drain Composite-STD
2 = Hot Gas Bypass
3 = SS Drain Pan No/HGB
4 = SS Drain Pan W/HGB
5 = Reverse Drain Pan No/HGB
6 = Reverse Drain Pan W/HGB
R = Reheat
S = SS Drain W/Reheat
T = Reverse Drain W/Reheat
A = No Options
B = Phase Monitor (PM)
C = Coil Guard (CG)
D = Dirty Filter Switch (DFS)
E = PM & CG
F = PM & DFS
G = CG & DFS
H = PM, CG, & DFS
Additional Options
Coated Coils
A = Un-Coated
B = E-Coat Cond & Evap Coils
C = E-Coat Condenser Coil
D = E-Coat Evaporator Coil
12 = 120 MBH Input(T06,T07,T08)
18 = 180 MBH Input (T06,T07,T08,T10,T12)
24 = 240 MBH Input(T10,T12)
24 = 24 KW (T06,T07,T08,T10,T12)
36 = 36 KW (T06,T07,T08,T10,T12)
18 = 18 KW (T06,T07,T08,T10,T12)
09 = 9 KW (T06,T07,T08)
54 = 54 KW (T10,T12)
T06 = 6.5 Ton
T07 = 7.5 Ton
T08 = 8.5 Ton
T10 = 10 Ton
T12 = 12.5 Ton
A=Std. Motor
D=Std. Motor/Motorized Damper (Downflow Only)
H=Std. Motor/Low Leak Econ/Barometric Relief
(Downflow & Horizontal End Return Only)
J=Std. Motor/Low Leak Econ/Power Exhaust
(Downflow & Horizontal End Return Only)
H=Hi Static
R=Hi Static/Motorized Damper (Downflow Only)
V=Hi Static Mtr/Low Leak Econ/Barometric Relief
(Downflow & Horizontal End Return Only)
W=Hi Static Mtr/Low Leak Econ/Power Exhaust
(Downflow & Horizontal End Return Only)

5808012-TIM-A-0320
Johnson Controls Ducted Systems 5
Installation
Installation safety information
Read the following instructions before you install this appliance.
This is an outdoor combination heating and cooling unit. The
installer must assure that these instructions are made available
to the consumer. The installer must instruct the consumer to
retain the instructions for future reference.
• Refer to the unit rating plate for the approved type of gas
for this product.
• Install this unit only in a location and position as specified
on Page 8 of these instructions.
• Never test for gas leaks with an open flame. Use
commercially available soap solution made specifically for
the detection of leaks when you check all connections.
See Pages 5, 37, 37 and 65 of these instructions.
• Always install the furnace to operate within the furnace's
intended temperature-rise range with the duct system and
within the allowable external static pressure range. This
information is specified on the unit name/rating plate and
specified on Page 67 of these instructions.
• This equipment is not to be used for the temporary
heating of buildings or structures under construction.
It is permitted to use the unit for heating and cooling of buildings
or structures under construction where the application and use
must comply with all manufacturer's installation instructions
including the following:
• Proper installation of vent outlet air and combustion air
intake hoods.
• The unit must be operated under thermostatic control.
• Return and supply air ducts must be sealed to the unit.
• Air filters in place;
• The unit furnace input rate and temperature rise must be
set according to the rating plate marking.
• The return air temperature must be maintained between
55ºF (13ºC) and 80ºF (27ºC).
• When the construction phase is completed and before
formal start up and commissioning, the unit, duct work
and components must be thoroughly cleaned and
inspected. This is to ensure that the operation of the unit
during construction did not contaminate the unit.
Note: If the unit is used during the construction phase, the
standard limited warranty provisions go into effect when
the unit is placed into operation.
Preceding installation
1. Remove the two screws that hold the brackets in the front,
rear, and compressor side fork-lift slots. See Figure 1
t
Figure 1: Unit shipping bracket
2. Turn each bracket toward the ground. The protective
plywood covering drops to the ground.
3. Remove the toolless doorknobs and instruction packet, see
Figure 3.
Figure 2: Barometric relief hood - shipping location
FIRE OR EXPLOSION HAZARD
Failure to follow the safety warning exactly could result
in serious injury, death, or property damage.
Never test for gas leaks with an open flame. Use a
commercially available soap solution made specifically
for the detection of leaks to check all connections. A fire
or explosion may result causing property damage,
personal injury, or loss of life.
Item Description
A Bracket screws
B Bracket
AB
Barometric relief hood in
shipping location (if included)

5808012-TIM-A-0320
6Johnson Controls Ducted Systems
Figure 3: Compressor section
4. If a factory option convenience outlet is installed, you must
install the weatherproof outlet in the field. The cover is
located behind the filter access panel.
a. Remove the shipping label that covers the convenience
outlet.
b. Follow the instructions on the back of the weatherproof
cover box.
c. Attach the cover to the unit with the four (4) screws
provided.
Limitations
These units must be installed in accordance with the following:
In the U.S.A.:
1. National Electrical Code, ANSI/NFPA No. 70 - Latest
Edition
2. National Fuel Gas Code, ANSI Z223.1 - Latest Edition
3. Gas-Fired Central Furnace Standard, ANSI Z21.47a. -
Latest Edition
4. Local building codes, and
5. Local gas utility requirements
In Canada:
1. Canadian Electrical Code, CSA C22.1
2. Installation Codes, CSA - B149.1.
3. Local plumbing and waste water codes, and
4. Other applicable local codes.
Refer to the unit application data found in this document.
After installation is complete, you must adjust gas fired units to
obtain a temperature rise within the range specified on the unit
rating plate.
If components are added to a unit to meet local codes, they are
installed at the dealer’s and/or customer’s expense.
The size of the unit for the proposed installation must be based
on a heat loss/heat gain calculation made according to the
methods of the Air Conditioning Contractors of America
(ACCA).
This furnace is not to be used for temporary heating of buildings
or structures under construction.
208/230-3-60 units with a factory installed powered
convenience outlet option are wired for a 230v power
supply. Change the tap on the transformer for 208-3-60
operation. See the unit wiring diagram.
Toolless
Doorknobs
Installation
Instruction
Packet
The Smart Equipment™ control board used in this
product can effectively operate the cooling system down
to 0°F when this product is applied in a comfort cooling
application for people. An economizer is typically
included in this type of application. When you apply this
product for process cooling applications (such as
computer rooms or switchgear), please call the
applications department for Ducted Systems @ 1-877-
874-SERV for guidance. Additional accessories may be
needed for stable operation at temperatures below 30°F.

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Johnson Controls Ducted Systems 7
Figure 4: Component location
Figure 4 shows the ZNT12 model. Table 1 lists the components of the unit.
Table 1: Component location table
Item Description Item Description
ATerminal block for high-voltage connection LTwo-stage gas heating to maintain warm, comfortable
temperature
BSmart Equipment™ control board with screw connector for thermostat
wiring and network connections MIntelligent control board for safe and efficient operation
CDisconnect location (optional disconnect switch) NSlide out drain pan with 1 inch NPT, female connection
DFilter access (2 in. or 4 in. filter options) OCompressor #1 access
EFilter drier (solid core) PSide entry power and control knockouts
FMicro-channel aluminum tube/aluminum fin condenser QToolless door latch
GSlide-out motor and blower assembly for easy adjustment and service RRoof curbs in eight-inch and fourteen-inch heights1
1. Roof curbs for transitioning from the old 3-5 ton footprint to the ZN Series footprints are also available (field-installed accessory).
HBelt-drive blower motor SBase rails with forklift slots (three sides) and lifting holes
IVFD Location TCompressor #2 access
JPower ventor motor UThree stage cooling for maximum comfort
K20-gauge aluminized steel tubular heat exchanger for long life
(stainless steel option) VSecond model nameplate inside hinged access panel
A
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
B
C
D
E
F
V

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8Johnson Controls Ducted Systems
Location
Use the following guidelines to select a suitable location for
these units:
• The unit is designed for outdoor installation only.
• Condenser coils must have an unlimited supply of air.
Where a choice of location is possible, position the unit on
either the north or east side of the building.
• Suitable for mounting on roof curb.
• For ground level installation, use a level concrete slab
with a minimum thickness of 4 inches. The length and
width must be at least 6 inches greater than the unit base
rails. Do not tie the slab to the building foundation.
• Roof structures must be able to support the weight of the
unit and its options and accessories. The unit must be
installed on a solid, level roof curb or appropriate angle
iron frame.
• Maintain level tolerance to 1/2 inch across the entire width
and length of the unit.
Clearances
All units require particular clearances for proper operation and
service. The installer must make provisions for adequate
combustion and ventilation air in accordance with section 5.3 of
Air for Combustion and Ventilation of the National Fuel Gas
Code, ANSI Z223.1 – Latest Edition (in U.S.A.), or Sections 7.2,
7.3, or 7.4 of Gas Installation Codes, CSA-B149.1 (in Canada) -
Latest Edition, and/or applicable provisions of the local building
codes. Refer to Table 6 for the clearances required for
combustible construction, servicing, and proper unit operation.
Table 2: ZNT06 - T12 unit limitations
Size
(tons) Model Unit voltage SCCR (kVA
Unit limitations
Applied voltage Outdoor DB temp
Minimum Maximum Maximum (°F)
T06
(6.5) ZN
208/230-3-60 5 187 252 125
460-3-60 5 432 504 125
575-3-60 5 540 630 125
T07
(7.5) ZN
208/230-3-60 5 187 252 125
460-3-60 5 432 504 125
575-3-60 5 540 630 125
T08
(8.5) ZN
208/230-3-60 5 187 252 125
460-3-60 5 432 504 125
575-3-60 5 540 630 125
T10
(10) ZN
208/230-3-60 5 187 252 125
460-3-60 5 432 504 125
575-3-60 5 540 630 125
T12
(12.5) ZN
208/230-3-60 5 187 252 125
460-3-60 5 432 504 125
575-3-60 5 540 630 125
Excessive exposure of the furnace to contaminated
combustion air may result in equipment damage or
personal injury. Typical contaminates include the
following items:
• Permanent wave solution
• Chlorinated waxes and cleaners
• Chlorine based swimming pool chemicals
• Water softening chemicals
• Carbon tetrachloride
• Halogen type refrigerants
• Cleaning solvents (for example, perchloroethylene)
• Printing inks
• Paint removers
• Varnishes
• Hydrochloric acid
• Cements and glues
• Anti static fabric softeners for clothes dryers
• Masonry acid washing materials

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Johnson Controls Ducted Systems 9
Rigging and handling
Exercise care when you move the unit. Do not remove any
packaging until the unit is near the place of installation. To rig
the unit, attach chain or cable slings to the lifting holes provided
in the base rails. You must use spreader bars across the top of
the unit. The spreader bars must have a length that exceeds
the largest dimension across the unit.
Units may be moved or lifted with a forklift. Slotted openings in
the base rails are provided for this purpose.
THE LENGTH OF THE - FORKS MUST BE A MINIMUM OF 60
INCHES.
Do not permit overhanging structures or shrubs to
obstruct the condenser air discharge outlet, combustion
air inlet, or vent outlets.
If a unit is installed on a roof curb other than a Ducted
Systems roof curb, you must apply gasketing to all
surfaces that come in contact with the unit underside.
Before lifting the unit, make sure that the unit weight is
distributed equally on the rigging cables so that it lifts
evenly.
All panels must be secured in place when the unit is
lifted.
The condenser coils must be protected from rigging
cable damage with plywood or another suitable material.

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10 Johnson Controls Ducted Systems
Figure 5: 4 point and 6 point load weight for ZNT12 units
Figure 6: 4 point and 6 point load weight for ZNT06 -T10 units
Figure 7: Center of gravity
A
LEFT
D
C
FRONT BA
LEFT
B
CD
FRONT E
F
D
A
CB
LEFT
FRONT
D
A
C
B
E
F
LEFT
FRONT
XY
LEFT FRONT

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Johnson Controls Ducted Systems 11
Table 3: ZNT06 - T12 standard unit weights
Size
(Tons) Model Weight (lbs.) Center of
Gravity 4 point Load Location (lbs.) 6 point Load Location (lbs.)
ShippingOperatingXYABCDABCDEF
T06
(6.5) ZN 1035 1030 39.6 25.3 245 197 262 327 170 146 126 168 194 226
T07
(7.5) ZN 1085 1080 38.7 23.7 245 189 281 365 171 142 121 180 212 255
T08
(8.5) ZN 1089 1084 38.4 24.4 255 193 274 361 178 147 123 175 208 252
T10
(10) ZN 1090 1085 38.8 24.8 257 199 274 355 179 150 127 175 207 247
T12
(12.5) ZN 1285 1280 49.6 24.1 231 291 422 335 149 172 202 292 249 215
Table 4: ZNT06 - T12 unit accessory weights
Unit accessory Weight (lbs.)
Shipping Operating
Economizer 90 85
Power exhaust 40 35
Electric heat149 49
Gas heat2110 110
1. The weight given is for the maximum heater size available (54KW).
2. The weight given is for the maximum number of tube heat
exchangers available (8 tubes).

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12 Johnson Controls Ducted Systems
Figure 8: ZNT06 -T10 physical dimensions
LEFT
A
59.00
C
D
E
F
4.19
27.31
89.00
21.19
11.38
15.38
59.00
15.38
29.69
15.25
FRONT
SEE DETAIL B
FOR DRAIN LOCATION
SEE DETAIL A FOR GAS INLET
B
2X Ø 24.38

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Johnson Controls Ducted Systems 13
Figure 9: ZNT12 physical dimensions
Table 5: ZNT06 - T12 unit physical dimensions
Unit model number Dimension (in.)
ABCDEF
ZNT06, T07, T08, T10, T12 50 3/4 89 30 3/16 24 3/16 17 3/16 6 3/16
ZNT12 50 3/4 119 1/2 30 3/16 24 3/16 17 3/16 6 3/16
15.23
29.03
14.85
29.03
14.85
15.23
28.86 29.66
44.09
Ø 24.58 TYP. 4 PL.
FRONT
See detail B for drain location
See detail A for gas inlet
C
D
E
F
B
4 3/16
27 5/16
89
21 3/16
11 3/8
A
LEFT
59

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14 Johnson Controls Ducted Systems
Detail A Detail B
50 3/4” CABINET
Ø 3.126
Ø 2.000
3.184
4.737
7.715
17.541
Gas Pipe Inlet
Gas Exhaust Vent
5-3/8
1” FPT
Table 6: ZNT06 - T12 unit clearances
Direction Distance (in.) Direction Distance (in.)
Top1
1. Units must be installed outdoors. Make sure that overhanging structures or shrubs do not obscure the condenser air
discharge outlet.
72 Right 12
Front 36 Left 36
Rear 36 Bottom2
2. Units may be installed on combustable floors made from wood or class A, B or C roof covering materials.
0

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Johnson Controls Ducted Systems 15
Top view
Figure 10: ZNT06 - T12 unit bottom duct openings
Bottom condensate drain
Bottom gas
supply entry
FRONT
RETURN
AIR
SUPPLY
AIR
RIGHT
LEFT
20 1/8 19 1/8 17 1/8
6 13/16
6 13/16
32 11/16
14 1/2
16 3/8
18 1/16
25 9/16
12 5/16
27 1/2 24
21
18
89
Ø 2.469
3X Ø 0.875
Bottom power, control
and convenience outlet
wiring entry

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16 Johnson Controls Ducted Systems
Figure 11: ZNT06 - T12 unit electrical entry
ZNT06 -T10 unit side duct openings
Disconnect Swith Cover
Power Entry Ø 2-1/2
Control Entry Ø 7/8
Power Entry Ø 2-1/2
Convenience Outlet Cover
Convenience Outlet
Power Entry Ø 7/8
FRONT
Table 7: ZNT06 -T10 side duct dimensions
Unit model number Dimension (in.)
ABCD
ZNT06, T07, T08, T10, T12 28 1/4 18 1/16 28 1/4 18 1/4
Dot Plugs
5-5/32
31-11/16
2-31/32
18-1/4
Return
Air
Supply Air
A
B
C
D

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Johnson Controls Ducted Systems 17
ZNT10 through -12 unit side duct openings
Figure 12: ZNT06 - T12 unit left/end duct opening
Table 8: ZNT12 side duct dimensions
Unit model number Dimension (in.)
ABCD
ZNT12 28 1/4 18 1/16 28 1/4 18 1/4
Table 9: Left/end duct dimensions
Unit model number Dimension (in.)
ABC
ZNT06, T07, T08, T10, T12 30.358 22.580 22.330
ZNT12 30.358 22.580 22.330
Dot Plugs
2-7/8
5-5/32
D
C31-5/8
18-1/4
B
A
4-5/16
A
C
B

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18 Johnson Controls Ducted Systems
Figure 13: ZNT06 - T12 roof curb
Figure 14: ZNT06 - T12 transition roof curb
8 or 14
50-1/2
30
20
20
80-5/8
6
2TYP.
INSULATED DECK UNDER
COMPRESSOR SECTION
INSULATED DECK UNDER
CONDENSER SECTION
FRONT
RIGHT
SUPPLY
RETURN
76-5/8
94
50-1/2 30-1/2
64-1/4
59-1/4
10
23 4
26 80-5/8
2TYP
FRONT RIGHT
SUPPLY
RETURN

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Johnson Controls Ducted Systems 19
Ductwork
You must design and size ductwork according to the methods in
Manual D of the Air Conditioning Contractors of America
(ACCA) or as recommended by any other recognized authority
such as ASHRAE or SMACNA. When you design the duct
system, apply the following recommendations.
• Use a closed return duct system. This does not preclude
the use of economizers or outdoor fresh air intake.
• Make the supply and return air duct connections at the
unit with flexible joints to minimize noise.
• Design the supply and return air duct systems for the CFM
and static pressure requirements of the job. Do not size
them to match the dimensions of the duct connections on
the unit.
See Figure 10 for bottom air duct openings. See Figure ,12 and
Tables 7 and 8 for side air duct openings.
Duct covers
Units are shipped with the side duct openings covered.
For a bottom duct application, no duct cover changes are
necessary.
For a side duct application, complete the following steps.
1. Remove the side duct covers.
2. Orient the supply panel with the painted surface up.
3. Slide the supply panel between the heat exchanger and
the unit bottom. The painted surface must face the heat
exchanger. The space is narrow but there is adequate
room to install the panel.
4. Secure the supply panel with the factory-installed bracket
and two screws.
5. Orient the return panel with the painted surface down.
6. Install the return panel over the corresponding side duct.
the painted surface must face the down flow duct opening.
7. Secure the return panel with four screws.
Figure 15: Side panels with hole plugs
Note: Note the orientation of the panel with the insulation side
facing up.
Figure 16: Return down flow plenum with panel
Figure 17: Discharge panel in place
Side panels
Units are shipped with side panels to cover the area where an
economizer or motorized damper may be installed. YOu must
keep these panels to use them as tops for the economizer rain
hoods (see Figure 18).
When you fasten ductwork to the side duct flanges on
the unit, insert the screws through duct flanges only. DO
NOT insert the screws through the casing. You must
insulate and water-proof outdoor ductwork.

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20 Johnson Controls Ducted Systems
Figure 18: Side panels for economizer hood tops
Condensate drain
The side condensate drain can be ordered re-oriented to the rear
of the cabinet to facilitate condensate piping. A condensate drain
connection is available through the base pan for piping inside the
roof curb.
Note: Plumbing must conform to local codes.
To install the connection, complete the following steps.
1. Trap the connection according to Figure 19.
Note: You must protect the trap and drain lines from freezing.
2. Install the condensate drain line from the 1 inch NPT
female connection on the unit to an open drain. Use a
sealing compound on male pipe threads.
Figure 19: Condensate drain
Compressors
The scroll compressors used in this product is specifically
designed to operate with R-410A refrigerant and cannot be
interchanged.
The compressors also use a polyolester (POE oil), Mobil 3MA
POE. This oil is extremely hygroscopic, meaning it absorbs water
readily. POE oil can absorb 15 times as much water as other oils
designed for HCFC and CFC refrigerants. Take all the necessary
precautions to avoid exposure of the oil to the atmosphere.
POE (polyolester) compressor lubricants are known to cause
long term damage to some synthetic roofing materials.
Procedures that risk oil leakage include, but are not limited to
the following:
• Compressor replacement
• Repairing refrigerant leaks
• Replacing refrigerant components such as the filter drier,
pressure switch, metering device or coil
Units are shipped with compressor mountings that are factory-
adjusted and ready for operation.
3" Minimum
This system uses R-410A refrigerant which operates at
higher pressures than R-22. No other refrigerant may be
used in this system.
Do not leave the system open to the atmosphere. Unit
damage could occur due to moisture being absorbed by
the POE oil in the system. This type of oil is highly
susceptible to moisture absorption
Exposure, even if immediately cleaned up, may cause
embrittlement (leading to cracking) to occur in one year
or more. When you perform any service that may risk
exposure of compressor oil to the roof, take precautions
to protect the roofing.
Do not loosen the compressor mounting bolts.